158664499 has 6 divisors (see below), whose sum is σ = 184568964. Its totient is φ = 135998100.

The previous prime is 158664487. The next prime is 158664503. The reversal of 158664499 is 994466851.

It is a happy number.

158664499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158664499 - 2⁷ = 158664371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158604499) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1618977 + ... + 1619074.

It is an arithmetic number, because the mean of its divisors is an integer number (30761494).

Almost surely, 2^158664499 is an apocalyptic number.

158664499 is a deficient number, since it is larger than the sum of its proper divisors (25904465).

158664499 is an equidigital number, since it uses as much as digits as its factorization.

158664499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238065 (or 3238058 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The square root of 158664499 is about 12596.2097076859. The cubic root of 158664499 is about 541.3688397407.

The spelling of 158664499 in words is "one hundred fifty-eight million, six hundred sixty-four thousand, four hundred ninety-nine".